Following the horrific shooting on the Las Vegas strip, we are still left to wonder about the killer's motivations. But while the incident in Las Vegas was unprecedented in scale, mass shootings have become a regular phenomenon in the United States, perpetrated by killers with a wide variety of motivations. In this episode, Juliette focuses on the common denominator by arguing that while motivation can be important, we need to pay more attention to the easy access to weapons that allowed him, and others like him, to create mass carnage.